allen



v (No Model.)

Patented Oct. 2, 1883.

fiwidfiam:

per 7 7 W/M/W flu 4M #W V v UNITED STATES PATENT Unmet.

pears with the hub removed, the point of sight tional strength, a doublecorrugated disk is my improvement is to make a lighter, stronger,

HORACE a. ALLEN, OFINDIANAPOLIS, INDIANA. v

PULLEY.

SPECIFICATION forming part of Letters? Patent No. 285,780, dated October2, 1883.

Application filed May 5, 1883. (No model.)

To all: whom it may concern:

Be it known that I, HORACE R. ALLEN, a eitizenof the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented a new and useful Pulley for Driving Machinery, of whichthe following is a specification.

My invention relates to improvements in pulleys in which I use a thinmetallic disk with corrugations running from the rim to thecenter,instead of spokes,to which I attach suitable cast-iron hubs and arimin a manner hereinafter more fully described; and the object of andcheaper pulley. I attain these objects by the mechanism illustrated inthe accompanying drawings, in which Figure 1 is a side view of my pulleyas it apbeing in thecenter of the axle; Fig. 2, a perspective view ofthe pulley with the hub removed, showing the radial corrugations and theattached rim; Fig. 3, a cross-section of the pulley on a line drawnthrough the center of the hub from opposite points of the rim; Fig. 4, across-section of pulley, in which, for addi:

used; Fig. 5, a perspective View of the' castiron hub as removed fromthe balance of the pulley; Fig. 6, a plan showing the manner of breakingjoints in split pulleys, or pulleys made in halves; Fig. 7, across-section of a metal plate made specially formy pulley.

Similar letters refer to similar parts throughout the several views.

I11 themanufacture of my pulley I take a rectangular sheet of metal, or,if more suitable, a sheet whose sides are curved, and by propermachinery bend the surface up into the corrugated forms A, Figs. 1 and2. These corrugations are broad at one end, the broad end being formedalways on the same edge of the sheet of metal, and are made to runtapering across the sheet to respective points in a line that isparallel with the opposite edge of the sheet and at, any requireddistance from it. This peculiar corrugated formation brings the two endsof the sheet together, forming a complete circular disk. This disk maybe readily formed from more than one piece, if desired. That part of thesheet between the apex of the corrugations and the outer edge of thesheet is, at the same timethe corrugations are made, bent at rightangles to the face of the disk B, and forms the rim D. fIt will be seenthat by making the corrugations in the sheet this flange or rim will,inconsequence of the eorru} 'gations, turn at right angles to. the planeof the disk. 1

The rim is spun perfectly round and true, and forms the support for asecond rim of sheet metal, 0, which is held in place by screws, or bythe rivets d, and forms the face of the pulley. This flange gives theattached rim a firm support throughout the circumference of the pulley.In many instances in pulleys for light work this outside and secondaryrim may be dispensed with, and to obviate the tendency of the belt toslip over an iron pulley, I create 'more friction on the face by makingthe secondary or outside rim, 0, of paper instead of sheet metal. Thisoutside'paper rim is glued or otherwise solidly attached to the flangeon the rim of the disk. I am also able to dispense with this secondaryrim by using a metallic sheet rolled expressly for my purpose, andhaving the part to be bent up for the rim made heavier than the portionof which the disk is formed, as shown in cross-section in Fig. 7, inwhich S is the part in which the corrugations are made, and s is, therim.

. The hub may either'be made in sections, as shown in the drawings, orit may be a single piece cast directly in its place on the metal disk.This is accomplished byadjusting the corrugated disk in themolding-flask in its proper position, and then pouring in the meltedmetalfor the hub, which cools and shrinks to the disk, making a veryfirm and solid pulley. The hub is then bored, the pulley placed on amandrel, and the flange or rim spun perfectly true and round. The hubshown in Figs. 3 and 5 is composed of three pieces. E is a collar havingabore to fit the shaft on which the pulley is to run. Notches to fit theradial cor rugations in the disk are cast on the side of the collar nextthe disk. The central hole in the disk is larger than the bore of thecollar E,

above referred to, and the intermediate space is filled by a metallicsleeve, F, which is a part and continuation of the collar E. This sleeveF has a hole of the same here as the collar E,

and has a screw-thread, f, formed on the outside of its outer end, forthe purposes hereinafter mentioned. H is a collar with a bore largeenough to admit the sleeve F. It has 5 notches corresponding with theradial corrugations in the disk B, cast on the side next the disk. G isa nut tapped to fit the thread on the collar F.

In practical operation the collar F is passed through the hole in thedisk B, the notches in the ring fitting in and filling the spacesbetween the corrugations A A. The ring H is then placed upon the collarfrom the opposite side, the notches filling the corrugations in the diskand the disk being between the two collars. The nut G is then screwed onthe end of the sleeve, bringing the two collars together and clampingthe disk solidly between them.

Vhen a very wide pulley is required, or for any reason a single disk isnot deemed sufficient, I combine the disks, as shown in Fig. 4, in whichthe collar E may have two projecting sleeves F 'F-one on each sideand adouble set of notchesone on each side. Two

2 5 corrugated disks may then be adjusted, one

on each side of the collar E, and are held in place by the two collars Hand H and nuts G- and G, shaped and combined as already described.

In Fig. 4, when very great strength is required, the two disks arereversedthat is, the faces now together are turned toward the outside,and the faces now turned outward are placed together, thus bringing theouter or 3 5 tapered ends of the corrugations near the outside edge ofthe face of the pulley.

In fastening my pulley to the shaft I use the ordinary key, or thesetescrew of common form and application; but when myhub, composed of 0the sections E F G H, is used I am able to clamp the pulley to the shaftby an arrangement in which the collar and sleeve E F are provided with alongitudinal slot, and the threaded end of the sleeve, f, is madetapering, so that when 4 5 the corrugated disk is placed between the twocollars and the nut G is screwed up on the taper-ing end of the slottedsleeve F, the taper will bring the sides of the slotted sleeve together,thus decreasing the diameter of the hole in the hub and consequentlyclamping the pulshown by the line on m, Fig. 1, and z .2 study 3 Fig. 5,and when put together are so adjusted that the parts will break j oints,as shown in an. m, y y, and z z, Figs. 5 and 6.

Having thus fully described my invention,

ning from the rim to the center, having a flange on its outercircumference at right angles to the disk and formed from the same plateas the disk, in combination with a stationary or an adjustable hub,substantially as described and set forth, and for the purposesspecified.

- 3. An adjustable hub composed of the serrated collar E, with thesleeve F, the serrated collar H, and the nut G, in combination with thecorrugated disk B,'as described, and for the purposes mentioned and setforth.

4. A secondary and external rim, 0, made of paper, in combination withthe corrugated disk B and its hub, substantially as described, and forthe purposes specified.

5. A secondary and external rim, 0, made of metal, in combination withthe corrugated disk B and its hub, substantially as described, and forthe purposes specified.

6.. A pulley having a corrugated disk, instead of spokes, made fromsheet metal, extra thick on one edge, Fig. 7, the thick edge beingturned up for the rim, as described, and for the purposes specified.

7. In a split pulley, my method of combining the parts so they willbreak joints, or. so no two lines of juncture, m m y y z-z, Fig. 6, willlie in the same vertical plan e, substantially as described, and for thepurposes specified.

8. An adjustable hub, in which the collar E and sleeve F have alongitudinal slot, and the sleeve F a threaded and slightly taperingend, f, in combination with the collar H, the nut Gr, and the corrugateddisk B, combined and arranged as described, and for the purposesspecified.

9. The combination of the disk B with the corrugations A and flange D,made from sheet metal of uniform gage, or from a sheet of varying gage,Fig. .7 ,-the external rim, 0, of metal or paper, a solid hub, asdescribed, or a hub in sections E F G H, with or without the clampingdevice, making either a solid or a split pulley, arranged and combined,substantially as described, to operate in the manner and for thepurposes set forth and specified.

' H. R. ALLEN.

\Vitnesses:

S. ALLEN, VAN Bonner SJIARWALT.

